Stuffing-box.



W. DE HUFF.

STUFFING BOX.-

' APPLICATION FILED APR. 23, 1912.

Patented July 16, 1912.

Izvenion- 77%20 UNITED STATES PATENT OFFICE,

WALTER DE HUFF, OF YORK, PENNSYLVANIA, ASSIGNOR TO THE READ MACHINERYCOMPANY, INC., OF YORK, PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA.-

STUFFINGr-BOX.

Specification of Letters Patent.

Patented July 16, 1912.

- Application filed April 23, 1912. Serial No. 692,686.

To all whom it may concern:

Be it known that I, 'IVALTER DE HUFF, a citizen of the United States,residing in York, Pennsylvania, have invented certain Improvements inStufling-Boxes, of which the following is a specification.

One object of this invention is to provide a novel construction ofstuffing box primarily designed to prevent leakage of liquid from acontainer along a rotating shaft at the point where said shaft enterssuch container; the arrangement of parts being such that the deviceshall properly perform its function even though the shaft should wear orloosely fit at its bearing or at its point of passage through thecontainer wall.

A further object of the invention is to provide a stufling box with anovel form of adjustable floating packing gland which shall follow theshaft to which it is applied, as this wears or changes its position inits bearings and thereby maintain a tight joint between the shaft andthe structure through which it passes.

These objects and other advantageous ends I secure as hereinafter setforth, reference being had to the accompanying drawings in which,

Figure 1 is a vertical section illustrating the detail construction ofmy invention; Fig. 2 is a vertical'section on the line aa, Fig. 1; andFigs. 3 and 4 are perspective views of certain of the parts of thestufling box shown in the other figures.

In the above drawings, 1 represents a portion of the wall or side of acontainer or other structure through which passes a rotat-ing shaft 2,there being preferably a bushing 3 mounted in said structure 1 forreceiving the shaft. Connected in any clesired manner to the containeror structure 1 is a bearing 4: having a bushing 5 by which the shaft 2is supported and said bearing is made yoke shaped so that the shaftpasses between its two supporting arms'or extensions 6. The outer faceof the bushing 5, is preferably made smooth or is finished andimmediately adjacent it I mount upon the shaft 2 an annular body 7 ofpacking, holding this in place by means of a ring shaped structure 8forming a gland, made concave on the side immediately adjacent the packing so as to receive one end or edge thereof. This structure 8 makes aneat running fit on the shaft and has an upwardly projecting lug 9 towhich is fixed a stud or screw 10. Its rear face is also provided withtwo wedge shaped project-ions 11 having inclined surfaces designed tocooperate with similarly inclined surfaces belonging to the arm of a Ushaped structure 12 fitting between "them and the bearing 1. The upperpart of this structure 12 is slotted at 13 for the reception of thescrew 10 which loosely passes through it and is held in any adjustedposition by a nut 14. With this arrangement of parts, the screwing downof the nut 14 pushes down the wedge shaped ends of the structure 12 andthrough the projections 11 forces the annular gland structure 8 towardthe packing 7. This latter is thereby forced against the bushing 3 insuch a manner as to form a fluid-tight joint between it and the shaft 2,it being understood that the said bushing makes a tight joint with thestructure in which it is mounted.

As the shaft wears in the bushing 5 of the bearing 4 or in the bushing 3so as to move downwardly or laterally, the annular' structure 8naturally, follows it as does also the packing 7 which is free to moveover the finished face of the bushing 3. A fluid-tight joint is thusmaintained between the shaft and said bushing and as the packing wearsit may be taken up by so turning the nut 14: as to force downwardly thewedge shaped ends of the U shaped piece 12. The packing thus floats withthe shaft and satisfactorily performs its function even though saidshaft varies its position very considerably relatively to the bearingand the bushing.

It is obvious that as the shaft moves downwardly on account of the wear,the annular structure 8 moves with it as does also the U shapedstructure 12, the same being true in case said shaft moves laterally,although 1n this instance the annular structure 8 will said structureand the bearing; a body of packing surrounding the shaft in position toprevent leakage of fluid through the structure around the shaft; and afloating device mounted on the shaft and maintaining the packing inoperative position.

3. The combination of a structure having a yoke shaped portion providinga bearing; a shaft passing through the structure and said bearing; abody of packing surrounding the shaft in position to prevent leakagefrom the structure around. the shaft; a gland mounted on the shaft; anda movable structure mounted between the gland and the bearing; withmeans connected to said gland for maintaining the packing in operativeposition.

t. The combination of a structure having an opening; a shaft passingthrough said opening; an abutment; a body of packing around the shaftadjacent the structure through which it passes; a gland for the packinghaving inclined surfaces; with a member mounted between the gland andthe abutment, and having inclined surfaces cooperating with those ofsaid gland.

5. The combination of a structure having an opening; a shaft passingthrough said opening; an abutment; a body of packing around the shaftadjacent the structure through which it passes; a gland for the packinghaving inclined surfaces; a member mounted between the gland and theabutment and having inclined surfaces cooperating with those of saidgland; with means connecting the gland and said member for forcing thegland toward the packing.

6. The combination of a structure having an opening and provided with abearing; a shaft passing through said opening and the bearing; a body ofpacking surrounding the shaft in position to prevent leakage between itand the structure through which it passes; a gland mounted on the shaftand provided with two inclined portions; a substantially U shapedstructure having its ends inclined to coact with the inclined portionsof the gland and mounted between the latter and the bearing; with athreaded member adjustably connecting the gland and the U shapedstructure for forcing said gland against the packing.

In testimony whereof, I have signed my name to this specification, inthe presence of two subscribing witnesses.

NALL'IER DE HUFF.

Vitnesses HARRY MOYER, DAVID S. MEISENHELDER.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. C.

